Strickland kneass



UNITED STATES PATENT STRIGKLAND KNEASS, OF PHILADELPHIA, PENNSYLVANIA, ASSIGNOR TO SAMUEL JAMES GRESWELL, OF SAME PLAGE.

SEWER-INLET.

To all whom it may concern.'

Be it known that I, STRICKLAND KNEAss, of the city and county of Philadelphia and State of Pennsylvania, have invented cer tain new and useful Improvements in Sewer` Inlets; and I do hereby declare the following to be a full, clear, and exact description of the construction and operation of the same, reference being had to the accompanying drawing, making a part of this specification, and which represents a sewer inlet made of cast-iron, with my invention applied thereto.

There are two diiiiculties encountered in sewer inlets, either of which, if not properly guarded against, are productive of great' damage to adjacent property, and either of which are likely to occur at times, notwithstanding the greatest vigilance and attention.` The first of these is, a proper escape for confined air in the sewer or inlet, without the annoyance of an escape of foul air, to prevent the sewer from choking, and overiowing the streets, pavements, and cellars, or damage to the sewer itself. The second is, the filling up of the inlet, and thus stopping the fiow of water into the sewer, in which event, the same overflow of the streets and filling of cellars occurs.

The object of my invention is not to prevent the compression of air in the sewers, or to prevent the filling up of the inlet, for this cannot be done.

My invention consists in the application to a sewer inlet, of a ventilator, through which the air when under pressure in the sewer may escape, and the lid or cover of which may be raised from the outside to convert it into an inlet, when the inlet proper becomes filled and choked up, and thus to prevent overflowing of the streets, and damage to contiguous property.

I am aware that a self acting valve has been so combined with a sewer, as to allow the air when under pressure in the sewer, to open said valve, and escape. This, so far as it goes is beneficial, but it does not provide or furnish any remedy for choked up inlets. Besides when applied 'to the sewer, they are difficult to arrange, as the sewer is generally in the center of the street,

and it 'would then incommode the travel. But this 1s not my invention. I provide `by one simple and cheap contrivance, a

remedy againsttwo of the greatest difficulties to be encountered in city drainage.

To enable others skilled in the art to make and use my invention, I will proceed to de scribe the same with reference to the drawings.

I have represented my ventilator as ap plied to a cast iron inlet. Of courseI do not confine myself to such an inlet, as it is equally applicable to the ordinary brick and stone inlets, but as the iron inlets are cheaper and better than the brick or stone ones, I prefer its application as represented.

The sump of the inlet is behind the plate A-the line B, designating the trap-plate. These whencast are in one piece.

C, is an arch,`the flue of which leads into the sewer. This is cast separately and bolted to the casting A.

D, isthe drip-plate. This is cast separately, and bolted to the casting A. This drip-plate may also represent the bottom of the street gutter.

The arch piece C, has a sleeve c, cast upon it, into which a pipe or tube b, projects, the

upper part of said pipe 0r tube being flush with the top of the drip plate. Or this pipe may be cast on the drip plate if so preferred.

c is a cover to the pipe or tube and opening upward. This cover is made light, and fastened to the tube or elsewhere by a chain CZ, or otherwise to prevent it from being carried Off. A

Then the sewer becomes choked up by the compressed air within it, the pressure will raise the cover, and ventilate the sewer, and thus prevent one of the causes of overfiow. lVhen the inlet itself becomes choked up, by the filling up of the sump, and the water cannot pass through it, then the cover c, is lifted off, and the pipe becomes an inlet 4to the fine of the arch without re quiring the water to flow through the sump. By this arrangement of the ventilator, many overflows may be avoided, and much of the annoyance and actual damage to property obviated.

Having thus fully described the nature converted into Ln iniet, when the iniet and object of my invention, what I claim as proper is choked up, substantially as herein new and desire to secure by Letters Pntdescribed. ent is- STRICKLAND KNEASS.

In combination with a sewer inlet, a Ven- Witnesses:

JOHN H. DYE,

tilator, that allows an esca-pe of compressed CHARLES READ.

air, from the sewer, and admits of being 

